Comparison Of Connectedness Measures And Changes In Connectedness Of The U.S. Duroc Population

Authors

N. Soga, Iowa State University
Matthew L. Spangler, University of Nebraska-LincolnFollow
C. R. Schwab, National Swine Registry
P. J. Berger, Iowa State University
T. J. Baas, Iowa State University

Date of this Version

8-2010

Citation

In Proceedings of the 9th World Congress on Genetics Applied to Livestock Production, Leipzig, Germany, August 1-6, 2010; http://www.kongressband.de/wcgalp2010/assets/html/0909.htm

Comments

Used by permission

Abstract

Introduction

Low levels of connectedness can create problems in uncoupling genetic and environmental influences on phenotypes. This can result in bias in prediction error variance and covariance, decreasing the accuracy of comparison of EBV across herds (Smith and Banos, 1991; Kennedy and Trus, 1993). The main objective of this study was to compare connectedness statistics published in the literature and determine which measure is most practical or suitable for estimating the risk associated with EBV comparisons in an across-herd analysis and to determine changes in connectedness in the U.S. Duroc population over time.